Had this happen 3 times now, I'll post a reply and it never appears yet the main index that topic will list my being the most recent to respond....

I have tried clearing my cache and not only flushing/changing my DNS but also tried other devices, still the vanished posts are not visible....

Software Glitch???

This occurs when the number of posts in a thread is stated incorrectly. It's known as a 'synchonisation error' and causes the wrong number of pages to be displayed for a thread.

I've fixed the problem now, but if it occurs again you can apply a temporary fix yourself by simply posting in the same thread again, which should generate the missing page.